Printing press



3 Sheets-Sheet 1 TTORNE YS Ott 1'3 1925- F. P.. ROSBACK PRINTING mass Filed latch 2B. 1924 Oct. 13, 1925.

F. P. RosaAcK PRINTING PRESS Filed lax-ch 28. 1924 3 Sheets-$neot 2 F. P. ROSBACK PRINTING PRESS Filed lax-ch 28.

3 SheetsF-Sheet 3 IN VETUR /ffi/c/r P fau/im A T T ORNE )d Patented Oct. 13, 1925.

UNITED STATES PATENT OFFICE.

FREDERICK P. ROSBACK, OF BENTON HARBOR, MICHIGAN, ASSIGNOR T0 F. I. ROSBACK COMPANY, OF BENTON HAR-BOR, MICHIGAN.

PRINTING PRESS.

Application filed March 28, 1924.

T0 all 107mm it may concern.'

Be it known that I, Financieel; l". Rosnaok, a citizen of the United States., residing at Benton Harbor, county of Berrien, State of l\'[ichigan, have invented certain new and useful Improvements in Printing Presses, of which the following is a specilication.

This invention relates to improvements in printing presses.

The main objectof the invention to provide in a printing press yin inil'irored inkmg means.

A further object is to provide in a printing press an improved inking means whereby no ink is supplied when the impression is od.

Further objects, and objects relating to details and economies of' construction. will definitely appear from the detailed description to follow.

I accomplish the objects of my invention by the devices and means described in the following specification. The invention is clearly defined and pointed ont in the claims.

A structure which is a preferred embodiment of my invention is clearly illustrated in the accompanying drawing, ftnfming a part of this application, in which:

Fig. I is a side elevation of a printing press embodying the features of my invention, only such parts of the machine being shown as are deemed necessary to illustrate my improvements and various parts being shown by dotted lines.

Fig. II is a top plan View, the n'iachine being shown mainly by dotted lines.

Fig. III is a fragmentary side elevation mainly in dotted lines, showing means for ope 'ating or controlling the nioven'ient of the form roller frame.

Fig. IV is a fragmentary side elevation showing means for holding the duc-tor roller out of contact with the fountain roller when the impression is off.

Fig. V is a fragmentary plan View, showing details of the ductor roll control methanism.

Fig. VI is a detail view partially in f-ection on a line corresponding to line 6--6 of Fig. V, showing further details of the ductor roll control means.

In the drawing similar reference charac- Serial No. 702,566.

ters refer to similar parts thrrmghoutthe several views, and the sectional views are taken looking in the direction of the little arrows atv the ends of the section lines.

Referring to the drawings, l represents the main frame of the machine, 2 the piow and 3 the platen.

In Fig. I, the press is closed. In Fig. III, the press is shown open.

The plow is pivotally mounted at An oscillating movement is imparted thereto by the crank disc 5 and the connecting rod G. The roller frame 7 carries the form rollers 8, the roller frame being pivoted at J on the plow.

In Fig. III, the form roller fin-imc is shown in its fully actuated position, that is, with the form rollers at the limit of their down stroke on the form. In Fig. I, the form rollers are shown in ink receiving position, or in contact with the inking cylinder l0.

The roller frame is actuated by a toggle mechanism consisting of the links ll, l2 and. 18. The link 13 is pivotally connected at 14 to the arm l5 on the plow and at l) to the link 12. The link ll is connected at 16 to the form roller frame and to the link l2 at IT, while the link 12 is pivoted to the frame of the machine at 18. The motion of the form roller frame is governed by the relative length and the pivotal points of these links. It is, of course, necessary that the links in this connection be arranged so that the full stroke carries the form rollers across the form.

It will be noted that the inking cti-*linder l0 is mounted close to the point 20 of the plow, thereby shortening the necessary stroke of the roller frame.

Referring again to the toggle for imparting movement to the roller frame, it will be noted that the pivot point left for the link IS swings about the pivot point ft for the plow. The pivot 18 for the link 'l2 being a fixed point, the roller frame is rocked or oscillated and, owing to the relation of the link pivots, it is actuated with a variable speed stroke, the speed decreasing and being quite slow while the form rollers are in engagement with the inking cylinder, so that the form rollers are l'naintained in engagement therewith for a substantial period of each stroke, thus insuring that the ink shall be well distributed t0 the form rollers.

Ink is supplied to the inking cylinder 10 from the fountain roller 21 driven from the wl and ratchet mechanism 22, the pavfl belng connected by the link 23 to the roller frame 7. The ink is transferred to the inking cylinder 10 by means of the ductor loller 24 and the distributing rollers 25, 26, 27 and 28-,see Fig. IV.

Movement is imparted t0 the ductor roller from the connecting rod 6 by means of tlhe link 29 which passes through the arm 30 on the rock shaft 31 carrying the arms 32 by which the ductor roller is carried. The link 29 is yieldingly connected to the arm 30 through the coiled springs 33 and 34 arranged on opposite sides of the arm and supported on the rod by means of the adjustable collars 35. These springs are of such tension as to normally swing the ductor roller, but yield when the ductor roller is locked in inoperative position, as will be described hereinafter. The springs also compensate for any excess movement in the rod 29, that is, normally the movement of the rod exceeds that required for swinging the ductor roller.

With the parts thus connected, at each stroke of the press, the ductor roll is swung into contact with the fountain roll, receiving ink therefrom, and is then swung into Contact with the distributing roller 25, the ink being squeezed between the rollers and 26, and then delivered to the inking cylinder 10. The rollers 27 and 28 assist in the even distribution of the ink by contact with the inking cylinder and with each other. The operation described is the normal operation.

However, in practice, should the feeder not be able to feed tlhe paper suiciently fast, or should the feed be checked, the type form would come into contact with the tympan transferring an impression thereto, so that when the next sheet was placed on the platen V it would receive an impression on the back from the tympan, or so-calledoffset impression. To prevent this, means are provided so that no impression is made although the stroke be completed. This is controlled from the lever 36 pivoted at 37 and connected b the link 38 and the arm 39 to the rock sha 40. This rock shaft has an arm 41 connected by the link 42 to an arm 43 on the eccentric 44 by means of which ythe connecting rod 6 is connected to the plow, so that rotation of this eccentric has the effect of chan 'ng the length of the connect-ing rod to sucl an eX- tent that when the lever is on its rearward position, no impression is made.

To prevent an excess supply `of ink bei-ng delivered to the inking cylinder while the impression is of, the parts as stated being shown in this position by full lines in Fig. IV, I provide means for supporting the ductor roll 24 so that it does not contact with the fountain roller.

It should also be noted that when the impression is off, the frame 7 does not travel 70 as far up as in normal operation. The end of its stroke when the impression is olf is shown by full lines in Fig. IV and when it is on by dotted lines.

On ltihe rock shaft 31 carrying the ductor 75 roll supporting arms 32 is a pin 45 adapted to engage the hole 46 in the locking bar 47 carried by the rock shaft 48 shown in detail in Fig. VI. This rock shaft has an arm 49 supported by the spring 50 on the rod 51, 80

ticn shown by full lines in Fi IV, the ock- Y8,5

ing bar is thrown downward y into engage-4 ment with the pin 45 thereby locking the ductor roll in the position shown by full lines, so that on the next upward stroke of the rod 29 the dnctor roll cannot contact 90 with the ink fountain roller 21.

A yielding locking pin or detent 54 is supported upon the frame to coact with the locking bar 47, preventing it changing its position except when the roller 53 is en- 95 gaged by the frame 7 or when actuated by the spring 50. Assuming the parts in p0- stion shown by the full lines or the impression olf and the lever 36 shifted to throw it on, the locking bar would remain in fullj00 line position shown in Fig. IV until re-` leased by the engagement of the frame 7 with the roller 53. This disengages the locking bar from the pin 45, allowing the ductor roll to operate until the impression is again thrown 0f.

In the accompanying drawing I have illustrated only such parts of a printing machine as seem necessary to illustrate an embodiment of my invention which I have found 11 very practical. I have notl attempted to' illustrate and describe various modifications and adaptations which I contemplate, or modifications which might be necessary to adapt my improvements to other forms of 1.15

presses, as I believe the disclosure made will enable those skilled in the art to which my invention relates to embody or adapt my improvements as may be desired.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. The combination in a printing press including a pivotally mounted plow` of means for oscillating said plow, an inking A12 cylinder, a form roller frame prvotall mounted on said plow, form rollers carri by said frame, means for actuating said form roller frame comprising an arm on said plow disposed above its pivot, a pair 13 of pivotally connected links, one ot which is pivotally connected to said frame and the other to a iixed support, a third link pivotally connected to one of said links and to said arm on said plow whereby the said roller frame is actuated with a speed decreasing on its upward stroke so that the form rollers are maintained in engagement with the inking cylinder for a substantial period, and means for supplying ink to said inking cylinder.

2. The combination in a printing press including a pivotally mounted plow, of means for oscillating said plow, an inking cylinder, a form roller Yframe pivot-ally mounted on said plow, form rollers carried by said frame, means for actuating said form roller frame comprising a pair oi pivotally connected links, one. of which is pivotally connected to said form roller frame and the other to a fixed support, and a third link pivotally connected to one ot' said links and to said plow whereby the said roller frame is actuated with a speed decreasing on its upward stroke so that the form rollers are maintained in engagement with the inking cylinder for a substantial period, and means for supplying ink to said inking cylinder.

The combination in a printing press including a pivotally mounted plow, ot a form roller frame pivot-ally mounted on said plow, form rollers carried thereby, an inking cylinder, means for supplying ink thereto, means for oscillating said plow, and a toggle connection for said form roller frame to said plow and to the frame of the press whereby the form roller frame is actuated with a variable speed stroke, the slowest speed being at the upper end of the stroke whereby the form rollers are maintained in contact with the inking cylinder for a substantial period.

4. The combination in a printing machine including a pivotally mounted plow, of a. form roller frame pivotally mounted on said plow, form rollers carried thereby, an inking cylinder, means for supplying ink thereto, mea-ns for oscillating said plow, and an operating connection for said form roller Yframe to said plow whereby the form roller frame is actuated with a variable speed stroke, the slowest speed being at the upper end of the stroke whereby the form rollers are maintained in contact with the inking cylinder for a substantial period.

5. The combination in a printing press in cluding a pivotally mounted plow, of means for oscillating said plow comprising a crank and connecting rod, said connecting vrod having an adjustable connection to said plow whereby the stroke of the plow may be varied to throw the press off or on, an inking cylinder, form rollers, a form roller frame pivotally mounted on said plow, operating connections tor said forni roller frame, a fountain roller, means t'or transferring ink from said fountain roller to said inking cylinder con'iprising a ductor roll, means for oscillatingly supporting said dnctor roll compri Q' a rock shaft, an arm on said rockshalit, a push rod carried by said connecting rod and slidably arranged through said arm on said rock shaft, sai-d push rod having springs mounted thereon to oppositely engage said arm providing a yielding connection thereto, means Yfor locking said rcckshaft in inoperative position con'iprising a pin on said rock shaft, a pivotally inounted locking bar adapted to engage said pin and provided with a roller operatively associated with said form roller frame, a detent coacting with said locking bar tor yieldingly supporting' it in its adjusted positions, and a push rod carried by said connecting rod adjusting means and having a yielding connection to said locking bar whereby the locking bar actuated to pin engaging position when said connecting rod is adjusted to throw the press oli, the said locking bar being released by said inking roller frame when the press is again thrown on,

(i. The combination in a printing press including a pivotally mounted plow, ot means for oscillating' said plow comprisingl a crank and connecting' rod, said connecting rod having' an adjustable connection to said plow whereby the stroke of the plow may be varied to throw the press ott "i an or on, inking cylinder, form rollers, a form roller frame pivotally mounted on said plow, operating connections tor said torni roller frame, a fountain roller, means for transferring ink from said fountain roller to said inking cylinder comprising` a ductor roll, means for oscillatingly supporting said ductor roll comprising a rockshatt, an arm on said rockshaft, a push rod carried by said connecting rod and slidably arranged through said arm on said rocksha'tt, said push rod having springs mounted thereon to oppositely engage said arm providing a yielding connection thereto, means for locking said rocksha'tt. in inoperative position comprising a pin on said rockshaft, a pivotally mounted locking bar adapted to engage said pin and provided with a roller operatively associated with said torni roller frame, and a push rod carried by said connecting rod adjusting means and having a yielding connection to said locking bar whereby the locking bar is actuated to pin engaging position when said connecting rod is adjusted to throw the press oth the said locking bar being released by said inking roller frame when the press is again thrown 011.

7. The combination in a printing press including a pivotally mounted plow, of means for oscillating said plow comprising a crank and connecting rod, means for adjustably connecting said connectin rod to said plow whereby the stroke of tie plow may be varied to throw the press off or on, an inking cylinder, form rollers, a form roller frame pivotally mounted on said plow, operating connections for said form roller frame, a fountain roller, means for transferring ink from said fountain roller to said inking cylinder comprising a ductor roll, means for oscillatingly supporting said 'ductor roll comprising a rockshaft, an arm on said rockshaft, a push rod carried by said connecting rod and slidably arranged through said arm on said rockshaft, said push rod having springs mounted thereon to oppositely engage said arm providing a ielding connection thereto, means for locklng said ductor roll in inoperative position o ratively connected to said connecting rod austing means whereby the ductor roll is rendered inoperative when the connecting rod is adjusted to throw the press off, and means for releasing said ductor roll locking means actuated by said inking roller frame when the press is on 8. The combination in a printing press including a pivotally mounted plow, of means for oscillating said plow comprising a crank and connecting rod, an inking cylinder,"

form rollers, a form roller frame pivotally mounted on said plow, operating connections for said form roller frame, a fountain roller, means for transferring ink from said fountain roller to said inking cylinder com prising a ductor roll, means for oscillatmgly supporting said ductor rollr com rising a rockshaft, an arm on said rockslliaft, and a push rod carried by said connecting rod and slidably arranged through said arm on said rockshaft, said push rod having springs mounted thereon to oppositely engage said arm providing a yielding connection thereto.

9. The combination in a printing press including a pivotall mounted plow, of means for actuatlng saidy plow, a throwoli" means for said plow, an in ing cylinder, form roll-` ers, a form roller frame pivotally mounted on said plow, operating connections for said form roller frame and plow',d a fountain roller, means for transferring ink from said fountain roller to said inking cylinder comprising an oscillatingly mounted ductor roll, means for oscillatin said ductor roll operatively associated wlth said plow actuatin means, means for locking said ductor ro to inoperative position operatively associated with said throw-ofi' means whereby the ductor roll is locked in ino rative position when the press is 06, ande means for disengaging said locking mea-ns including said inking roller frame whereby the 'ductor roller is released when the press is en 10. The combination in a rinting press including a pivotally mounte plow, of means for actuating said plow, a throw-off means for said plow, an inking cylinder, for-In rollers, a form roller frame pivotally mounted on said plow, operating connections for said form roller frame and plow, a fountain roller, means for transferring ink from Said fountain roller to said inking cylinder comprising an oscillatingly mounted ductor roll, means for oscillating said ductor roll operatively associated with said plow actuating means, means for locking said ductor roll to inoperative osition opeativi associated with said throw-off means w ereb the Vductor roll' is locked in inoperative position when the press is 06, and means for disengaging said locking means including said inking roller frame whereby the ductor roller is released when the press is 011.

In witness whereof, I have hereunto set my hand.

FREDERICK P. RosBACK. [L 8.] 

